Renesas RL78/G1P Hardware User Manual page 568

RL78/G1P
The RL78/G1P has an internal DMA (Direct Memory Access) controller.
Data can be automatically transferred between the peripheral hardware supporting DMA, SFRs, and internal RAM
without via CPU.
As a result, the normal internal operation of the CPU and data transfer can be executed in parallel with transfer
between the SFR and internal RAM, and therefore, a large capacity of data can be processed. In addition, real-time
control using communication, timer, and A/D can also be realized.
13.1 Functions of DMA Controller
 Number of DMA channels: 2 channels
 Transfer unit: 8 or 16 bits
 Maximum transfer unit: 1024 times
 Transfer type: 2-cycle transfer (One transfer is processed in 2 clocks and the CPU stops during that processing.)
 Transfer mode: Single-transfer mode
 Transfer request: Selectable from the following peripheral hardware interrupts
 A/D converter
 Serial interface (CSI00, UART0)
 Timer (channel 0, 1, 2, or 3)
 Transfer target: Between SFR and internal RAM
Here are examples of functions using DMA.
 Successive transfer of serial interface
 Batch transfer of analog data
 Capturing A/D conversion result at fixed interval
 Capturing port value at fixed interval
R01UH0895EJ0100 Rev.1.00
Nov 29, 2019
CHAPTER 13 DMA CONTROLLER
CHAPTER 13 DMA CONTROLLER
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